diff -uNr libao-0.8.6/configure libao-0.8.6-new/configure
--- libao-0.8.6/configure	Tue Jan 11 16:08:26 2005
+++ libao-0.8.6-new/configure	Sat Jan 29 17:23:03 2005
@@ -19227,6 +19227,10 @@
 	DLOPEN_FLAG='(RTLD_LAZY)'
 	SHARED_LIB_EXT='.so'
 	;;
+	*darwin*)
+	DLOPEN_FLAG='(RTLD_LAZY)'
+	SHARED_LIB_EXT='.dylib'
+	;;
     *)
 	DLOPEN_FLAG='(RTLD_NOW | RTLD_GLOBAL)'
 	SHARED_LIB_EXT='.so'
diff -uNr libao-0.8.6/src/plugins/macosx/ao_macosx.c libao-0.8.6-new/src/plugins/macosx/ao_macosx.c
--- libao-0.8.6/src/plugins/macosx/ao_macosx.c	Tue Nov  9 02:20:26 2004
+++ libao-0.8.6-new/src/plugins/macosx/ao_macosx.c	Sat Jan 29 17:26:09 2005
@@ -173,6 +173,26 @@
 	return 0;
     }
 
+	if (internal->outputStreamBasicDescription.mChannelsPerFrame != format->channels)
+	{
+		internal->outputStreamBasicDescription.mChannelsPerFrame = format->channels;
+		internal->outputStreamBasicDescription.mBytesPerFrame =
+			internal->outputStreamBasicDescription.mChannelsPerFrame * sizeof (float);
+		internal->outputStreamBasicDescription.mBytesPerPacket =
+			internal->outputStreamBasicDescription.mBytesPerFrame *
+			internal->outputStreamBasicDescription.mFramesPerPacket;
+		status = AudioDeviceSetProperty(internal->outputDeviceID, 0, 0, 0,
+			kAudioDevicePropertyStreamFormat,
+			sizeof (internal->outputStreamBasicDescription),
+			&internal->outputStreamBasicDescription);
+		if (status != noErr)
+		{
+			fprintf(stderr, "ao_macosx_open: AudioDeviceSetProperty returned %.*s when setting kAudioDevicePropertyStreamFormat\n",
+				(int) sizeof (status), (char *) &status);
+			return 0;
+		}
+	}    
+
     fprintf(stderr, "hardware format...\n");
     fprintf(stderr, "%f mSampleRate\n", internal->outputStreamBasicDescription.mSampleRate);
     fprintf(stderr, "%c%c%c%c mFormatID\n", (int)(internal->outputStreamBasicDescription.mFormatID & 0xff000000) >> 24,